﻿// Copyright 2008 Chris Varley (http://www.contractdriven.net/)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using System.Collections.Generic;
using System.Globalization;

namespace ContractDriven.CommonAssertions
{
    #region Not Equal Assertion
    /// <summary>
    /// Verifies that two objects are not equal, using a custom comparer.
    /// </summary>
    /// <typeparam name="T">The type of the objects to be compared</typeparam>
    public class NotEqualAssertion<T> : BaseEqualAssertion<T>
    {
        #region Constructors
        /// <summary>
        /// Verifies that two objects are not equal, using a default comparer.
        /// </summary>
        /// <typeparam name="T">The type of the objects to be compared</typeparam>
        /// <param name="expected">The expected object</param>
        /// <param name="actual">The actual object</param>
        public NotEqualAssertion(T expected, T actual)
            : this(expected, actual, AssertComparer<T>.GetComparer())
        { }

        /// <summary>
        /// Verifies that two objects are not equal, using a custom comparer.
        /// </summary>
        /// <typeparam name="T">The type of the objects to be compared</typeparam>
        /// <param name="expected">The expected object</param>
        /// <param name="actual">The actual object</param>
        /// <param name="comparer">The comparer used to examine the objects</param>
        public NotEqualAssertion(T expected, T actual, IComparer<T> comparer)
            : base(expected, actual, comparer)
        {
            FailureDescription = string.Format(CultureInfo.CurrentCulture, Resource.NotEqualAssertion, Expected, Actual);
        }
        #endregion
        #region Eval Method
        public override bool Eval()
        {
            return (Comparer.Compare(Expected, Actual) != 0);
        }
        #endregion
    }
    #endregion
}
